Climate averages 1991–2020
Belfast weather
in June.
A mild, moderately wet month: the 3rd warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in Belfast: daytime highs average 15.9°C and nights cool to about 10.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 75 mm of rain on roughly 13 days, which makes June a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 17 h 10 min on an average June day.
The nearest other city in this atlas is Lisburn (11 km away). In June its highs average 16.2°C, about as warm as Belfast, with 75 mm of rain.
Among the 143 cities listed in the United Kingdom, Belfast ranks joint 138th of 143 for the warmest June highs and joint 112th of 143 for the driest June (rainfall, lowest first). The mean June high of those 143 cities is 17.9°C; Belfast is 2.0°C cooler than that mean.
From June to July, average highs rise by 1.5°C to 17.4°C, and monthly rainfall rises from 75 mm to 81 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Belfast climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.5°C3.9°C | 3.9°C | 77 | 14.2 | 7.98 h |
| February | 7.7°C3.8°C | 3.8°C | 63 | 12.2 | 9.710 h |
| March | 9.1°C4.4°C | 4.4°C | 62 | 13.4 | 11.812 h |
| April | 10.9°C5.9°C | 5.9°C | 65 | 13.0 | 14.014 h |
| May | 13.6°C8.2°C | 8.2°C | 70 | 14.1 | 16.016 h |
| June, selected | 15.9°C10.9°C | 10.9°C | 75 | 13.2 | 17.217 h |
| July | 17.4°C12.5°C | 12.5°C | 81 | 14.6 | 16.717 h |
| August | 17.3°C12.6°C | 12.6°C | 81 | 14.2 | 14.915 h |
| September | 15.7°C11.3°C | 11.3°C | 70 | 12.5 | 12.813 h |
| October | 12.8°C9.0°C | 9.0°C | 86 | 13.5 | 10.611 h |
| November | 9.8°C6.4°C | 6.4°C | 85 | 14.0 | 8.59 h |
| December | 7.9°C4.4°C | 4.4°C | 82 | 13.5 | 7.47 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Lisburn in JuneUnited Kingdom · 11 kmHigh 16.2°C · Low 10.4°C · 75 mm rain
- Derry in JuneUnited Kingdom · 99 kmHigh 15.9°C · Low 10.2°C · 87 mm rain
- Douglas in JuneIsle of Man · 106 kmHigh 13.8°C · Low 11.7°C · 64 mm rain
- Dublin in JuneIreland · 142 kmHigh 17.3°C · Low 11.1°C · 73 mm rain
- Tallaght in JuneIreland · 149 kmHigh 17.0°C · Low 10.6°C · 73 mm rain
- Paisley in JuneUnited Kingdom · 167 kmHigh 16.0°C · Low 9.5°C · 84 mm rain
- East Kilbride in JuneUnited Kingdom · 171 kmHigh 15.4°C · Low 8.7°C · 86 mm rain
- Glasgow in JuneUnited Kingdom · 176 kmHigh 16.0°C · Low 9.4°C · 86 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Belfast) is explained once on the Belfast year overview and on the Sources, method and limits page.
Lisburn lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.